In bristle worms, what is the name of paired, fleshy extensions of the body wall that are used for locomotion and gas exchange?
a. setae
b. parapodia
c. septa
d. metanephridia
Ans: b. parapodia
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a. day-neutral plants. b. vernalized plants. c. long-day plants. d. senescing plants. e. short-day plants.
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a. attachment to microtubules. b. a mitotic spindle. c. repellent forces. d. attachment to separating membrane regions. e. All of the above
Which of the following preservation tactics would have the greatest impact on saving the largest number of species?
A. preserve a large tract of land that contains source populations of flagship species B. preserve multiple small tracts of land that each contain source populations of keystone species C. preserve several small tracts of land that contain source populations of keystone species D. preserve a large tract of land that contains source populations of keystone species E. preserve a large tract of land that contains sink populations of keystone species